Quote Originally Posted by pythoncrazy View Post
I was going on sizes based on rodentpro.com if you look at the picture XL rats are about as wide as a dollar so an adult female ball python should be able to eat one easily. I'm not sure that I would agree to the ages this website has for rat sizes but they say an adult sized rat is XL and a large rat is 45-60 days old. And XL rats from their pictures are not much bigger than large rats. But I heard from yahoo answers that an adult sized rat is five-six months old so I don't know.
Surely there is a scientific formula for appropriate feeding of a snake, represented as a proportion of food weight to snake weight. I have not seen it yet on this site. Most of what I read expresses the formula as something like "one large rat every 2 weeks". That's just not very accurate IMO.

Please can someone who actually knows this tell me what the formula should be? For example "10% of body weight per month" or whatever the correct formula should be?